How To Disable Terminal Services Remote Control

[webuser]

I am a consultant for several Terminal Server Machines at several different customers. Unfortunately, there are multiple administrators on the machines that I am using - administrators who work for my clients. The thought occured to me that while i am working on their machines (sometimes sensitive items), an admin can uncheck the "Require Users Permission" check box on my login's Remote Control Tab, remote control my session without my knowledge (i.e watch what I am doing) and then cover his/her tracks by checking the box again. So, is there a way that i can stop that possibility from existing? Is there a way to know for sure while you are being remote controlled? Any other suggestions to help alleviate my fears?

Thanks!!!